Product Overview
When monitoring vibration in hazardous industrial environments, the Bently Nevada 107770-03-03 provides a reliable, preassembled solution. This velocity transducer housing combines the 330500 Velomitor Sensor with a 21128 Housing, factory-installed for immediate use. It carries CENELEC approval for Zone 1, Group IIC hazardous area applications, making it suitable for demanding locations such as oil refineries, chemical plants, and gas processing facilities.
Technical Specifications Breakdown
The 107770-03-03 features specific mounting and cable exit options that define its installation flexibility. The mounting thread option is 1/2-14 NPT, ensuring a secure fit in standard industrial ports. The cable exit fitting is also 1/2-14 NPT explosion-proof with a cable gland seal, providing a safe, sealed connection in hazardous zones. This model is rated for CENELEC Zone 1, Group IIC areas, and complies with ATEX/IECEx conditions for safe use in Zone 0/1 and Zone 2 environments. The equipment must be connected to devices meeting the listed entity parameters, and cable types A or B per EN 60079-25 must respect those parameters.
Industry Applications
In petrochemical plants, the 107770-03-03 monitors rotating machinery such as pumps, compressors, and turbines. Its CENELEC Zone 1 rating allows installation in areas where flammable gases may be present during normal operation. The preassembled design reduces field wiring errors and speeds up deployment. For gas processing facilities, the explosion-proof cable gland ensures that no sparks or heat escape the housing, maintaining safety in Group IIC atmospheres (hydrogen, acetylene, etc.).
Installation & Setup Guidance
Mount the 107770-03-03 using the 1/2-14 NPT thread into a compatible port on the machine casing. Ensure the mounting surface is clean and free of debris to achieve proper vibration coupling. The cable exit fitting must be tightened to the specified torque to maintain the explosion-proof seal. Use cable types A or B as defined in EN 60079-25, and verify that the connected equipment meets the entity parameters listed for the hazardous area classification. For Zone 2 installations, the supply electrical parameters must not exceed the values in the provided tables.
Maintenance & Reliability
Regularly inspect the cable gland and mounting threads for signs of corrosion or damage. Verify that the housing remains securely fastened and that the cable exit seal is intact. The preassembled design minimizes internal component wear, but periodic functional testing of the Velomitor sensor output is recommended. In hazardous areas, follow the manufacturer's safety guidelines for inspection intervals. This proactive approach extends service life and reduces unplanned downtime.
Selection Guide & Purchasing Advice
Before ordering, confirm that your application requires the 1/2-14 NPT mounting and cable exit options. Verify that the hazardous area classification matches CENELEC Zone 1, Group IIC or equivalent ATEX/IECEx zones. The 107770-03-03 is supplied as a new, original factory-packed unit with a 12-month warranty. SpareTechPLC offers this model with full traceability and support. Please verify current lifecycle status and availability with SpareTechPLC before ordering.
Frequently Asked Questions
Q: What is the difference between the 107770-03-03 and a standard Velomitor sensor?
A: The 107770-03-03 is a preassembled unit combining the 330500 Velomitor Sensor with a 21128 Housing, factory-installed for hazardous area use. It includes the 1/2-14 NPT mounting and explosion-proof cable gland, eliminating field assembly.
Q: Can the 107770-03-03 be used in Zone 0 areas?
A: Yes, the ATEX/IECEx conditions of safe use allow installation in Zone 0/1, provided the equipment is connected to devices meeting the entity parameters and cable types A or B per EN 60079-25 are used.
Q: What cable types are acceptable for this housing?
A: Cable types A or B in compliance with EN 60079-25 must be used, respecting the cable parameters listed with the entity parameters.
Q: Is the 107770-03-03 RoHS compliant?
A: Yes, it complies with RoHS Directive 2011/65/EU.
Q: Does SpareTechPLC offer warranty on this product?
A: Yes, the 107770-03-03 comes with a 12-month factory warranty when purchased from SpareTechPLC.
